Although usually referred to as a commercial broadcaster, Channel 4 is in fact listed as a public service broadcaster for legal reasons, being partially funded by licence fees following a financial emergency in 2007, as well as having historic ties with Welsh public service channel S4C. The channel itself mainly features entertainment-based programming, with key genres including music, comedy, gameshows, and reality TV. Much of the content from Channel 4, as well as from sister channels such as E4 and More4, are available on the network's official on-demand service 4OD.